Dude that’s sick! Out of curiosity do you also play any instruments? I’m neurotypical but learning bass aswell as trumpet really made a bunch of theory stuff click for me
(Feel free to ignore this if it doesn’t work ADHD wise) Also a quick note on composition- if you hear something in a song and go “oh that’s a good idea” totally steal it, or a bit of it and repurpose it for your own songs. The best songs I’ve ever written were a bunch of cool bits from different songs and my own ideas. For example on a piece I’m just finishing I stole the chord progression from a j rock song I like (changed it a bit to make it better) and I stole a bunch of chord structures from a guitar solo, and stole a bit of the drum pattern for a bunch of different songs all mashed together. Robbery is cool
I would have never thought that NIN could be calming, to me some NIN stuff feels like I’ve got blood poisoning or something haha